Fish Encyclopedia
Search and identify 1,000+ fish species — freshwater, saltwater, reef, and pelagic — with habitat, size, diet, behavior, and how to tell them apart.
Seahorse
An unmistakable upright-swimming fish with a horse-like head and curled prehensile tail, notable for males carrying and giving birth to offspring.
reef
White's Seahorse
White's seahorse is an endangered species endemic to the temperate estuaries of eastern Australia, best known for colonizing artificial structures like marina pylons and 'seahorse hotels' installed for conservation.
reef
Spotted Seahorse
The spotted seahorse, also called the yellow seahorse, is a widespread Indo-Pacific species with a smooth body, low coronet, and highly variable coloring that ranges from plain yellow to dark blotched patterns.
reef
Lined Seahorse
A medium-sized seahorse of the western Atlantic coast, variably colored from black to bright orange, often marked with fine pale lines on the neck and named for these subtle streaks.
saltwater
Yellow Seahorse
A widespread and highly variable Indo-Pacific seahorse, commonly seen in bright yellow though also occurring in black, orange, or mottled brown, found from mangrove estuaries to coral reefs.
reefZebra Seahorse
A small, boldly striped seahorse endemic to northern Australian waters, patterned with fine dark bands that give it a distinctly zebra-like appearance.
reef
Thorny Seahorse
A spiky Indo-Pacific seahorse covered in long, sharp bony projections, giving it a thorny, almost alien silhouette that helps it disappear among sponges and gorgonian coral.
reef
Pygmy Seahorse
A tiny, near-invisible seahorse that lives its entire life camouflaged on gorgonian sea fans in the Coral Triangle, its bulbous skin tubercles mimicking the coral's polyps exactly.
reef
Hedgehog Seahorse
One of the spiniest seahorses, the Hedgehog Seahorse is covered in numerous sharp, elongated body spines that give it a distinctly bristled silhouette against reef rubble.
reef
Longsnout Seahorse
A slender, long-snouted seahorse native to the western Atlantic that anchors itself to soft corals and mangrove roots with its prehensile tail. It comes in a wide range of colors, from yellow and orange to red and black.
reef
Dwarf Seahorse
One of the smallest seahorse species in the world, standing barely a few centimeters tall and clinging to seagrass blades in shallow waters of the southeastern United States and Bahamas.
saltwater
Barbour's Seahorse
A small, spiny-crowned seahorse native to the coral reefs and seagrass beds of the western Pacific, distinguished by fine dark banding along its snout.
reef
Long-snouted Seahorse
The long-snouted seahorse, also known as the spiny seahorse, is a slender species of the Mediterranean and northeastern Atlantic with a proportionally long snout and often ornate skin filaments used for camouflage in seagrass beds.
saltwater
Big-belly Seahorse
The largest seahorse species in the world, recognized by its notably rounded, protruding belly and mottled brown-yellow coloration, found along the temperate coasts of Australia and New Zealand.
saltwater
Tiger Tail Seahorse
A Southeast Asian reef seahorse easily recognized by the bold alternating light and dark stripes banding its prehensile tail, resembling a tiger's pattern.
reef
Short-snouted Seahorse
The short-snouted seahorse is a stocky, spiny-headed species found in coastal waters of the Mediterranean and eastern Atlantic, distinguished from its long-snouted relative by a notably short, thick snout.
saltwater
Leafy Seadragon
An extraordinary seahorse relative covered in ornate leaf-shaped appendages, camouflaging almost perfectly among the kelp and seaweed beds of southern Australia.
reef
Northern Pipefish
A slender, bony-ringed relative of the seahorse that drifts vertically among eelgrass along the western Atlantic coast, camouflaged by its stick-like shape.
saltwater
Weedy Seadragon
A slender, reddish-purple relative of the seahorse decorated with small leaf-like fin projections and yellow stripes, found along the temperate reefs of southern Australia.
reef
Pipefish
A slender, elongated relative of the seahorse with a rigid, ring-plated body and tubular snout, commonly found camouflaged among seagrass and algae in coastal waters worldwide.
saltwater
Greater Pipefish
One of Europe's largest pipefish, the Greater Pipefish is a long, tube-snouted relative of the seahorse found among seagrass and rocky shallows from Scandinavia to the Mediterranean.
saltwater